CVE-2025-47581: 
WordPress vulnerability analysis and mitigation

A critical Deserialization of Untrusted Data vulnerability (CVE-2025-47581) has been identified in Elbisnero WordPress Events Calendar Registration & Tickets plugin, affecting versions through 2.6.0. The vulnerability was discovered and published on May 16, 2025, allowing Object Injection without requiring authentication (Patchstack, NVD).

The vulnerability is classified as CWE-502 (Deserialization of Untrusted Data) with a CVSS v3.1 score of 9.8 CRITICAL (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). This severity score indicates that the vulnerability requires no special privileges or user interaction for exploitation, making it particularly dangerous (NVD, Wiz).

The vulnerability could enable malicious actors to execute code injection, SQL injection, path traversal, and denial of service attacks if a proper POP chain is present. The high CVSS score indicates potential for complete compromise of system confidentiality, integrity, and availability (Patchstack, Wiz).

Patchstack has issued a virtual patch to mitigate this issue by blocking any attacks until an official fix becomes available. The virtual patch can be used to protect affected websites while waiting for an official update from the plugin developer. No official fix is currently available (Patchstack).